Solved: 3702i autonomous - cannot enable >20MHz channels?

train_wreck · ‎07-30-2016

Hello. I have a 3702i in autonomous mode, and am trying to enable 80MHz 802.11ac on the 2nd radio interface ("interface Dot11Radio 1"). I am noticing that I am unable to select any 40MHz or 80MHz channels:

WAP(config)#interface Dot11Radio 1
WAP(config-if)#channel ?
  <36-5825>  One of: 36 40 44 48 149 153 157 161 165 5180 5200 5220 5240 5745
             5765 5785 5805 5825
  dfs        Use Dynamic Frequency Selection
  width      Bandwidth used

According to this: https://en.wikipedia.org/wiki/List_of_WLAN_channels#5.C2.A0GHz_.28802.11a.2Fh.2Fj.2Fn.2Fac.29.5B17.5D

All of the available channels are only 20MHz.

When I try to set the "channel width" to 80MHz, the command enters, but does not appear to be functional. The GUI reports the width to be 20MHz, and all 802.11ac clients I've tried are only able to see 173mbps from the Aironet, no matter which channel I select.

Any idea what's going on here?

Rasika Nayanajith · ‎07-31-2016

channel width 80
 channel 5825

You have selected channel 5825 (CH165) for radio 1. This channel cannot use to bond 40MHz or 80 MHz width as it is isolated 5GHz channel.

Use channel 36 ,52 or 149 if you want 80MHz width (or else leave it to default & let AP to choose the preferred channel)

HTH

Rasika

*** Pls rate all useful responses ***

View solution in original post

train_wreck · ‎07-30-2016

Here is full config:

Building configuration...
  
Current configuration : 4601 bytes
!
! Last configuration change at 00:41:27 -0500 Fri Jul 29 2016
! NVRAM config last updated at 17:02:56 -0500 Thu Jul 28 2016
! NVRAM config last updated at 17:02:56 -0500 Thu Jul 28 2016
version 15.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname WAP1
!
!
logging rate-limit console 9
enable secret 5 ---
!
aaa new-model
!
!
aaa authentication login CONSOLE local
!
!
!
!
!
aaa session-id common
clock timezone CST -6 0
clock summer-time -0500 recurring
no ip source-route
no ip cef
ip domain name Domain.site
ip name-server 172.16.16.2
!
!
!
!
dot11 mbssid
dot11 syslog
dot11 vlan-name LAN vlan 20
!
dot11 ssid MAIN
   vlan 20
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 7 ---
!
dot11 ssid MAIN-5G
   vlan 20
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 7 ---
!
dot11 ssid Public
   vlan 25
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 7 ---
!
dot11 ssid Public-5G
   vlan 25
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 7 ---
!
!
!
no ipv6 cef
!
!
username wil password 7 ---
!
!
bridge irb
!
!
!
interface Dot11Radio0
 no ip address
 !
 encryption vlan 20 mode ciphers aes-ccm
 !
 encryption vlan 25 mode ciphers aes-ccm
 !
 ssid MAIN
 !
 ssid Public
 !
 antenna gain 0
 stbc
 speed  basic-1.0 basic-2.0 basic-5.5 basic-11.0 basic-6.0 basic-9.0 basic-12.0 basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15. m16. m17. m18. m19. m20. m21. m22. m23.
 channel 2462
 station-role root
!
interface Dot11Radio0.20
 encapsulation dot1Q 20 native
 no cdp enable
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 spanning-disabled
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
!
interface Dot11Radio0.25
 encapsulation dot1Q 25
 no cdp enable
 bridge-group 2
 bridge-group 2 subscriber-loop-control
 bridge-group 2 spanning-disabled
 bridge-group 2 block-unknown-source
 no bridge-group 2 source-learning
 no bridge-group 2 unicast-flooding
!
interface Dot11Radio1
 no ip address
 !
 encryption vlan 20 mode ciphers aes-ccm
 !
 encryption vlan 25 mode ciphers aes-ccm
 !
 ssid MAIN-5G
 !
 ssid Public-5G
 !
 antenna gain 0
 peakdetect
 dfs band 3 block
 stbc
 speed  basic-6.0 basic-9.0 basic-12.0 basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15. m16. m17. m18. m19. m20. m21. m22. m23. a1ss9 a2ss9 a3ss9
 channel width 80
 channel 5825
 station-role root
 world-mode dot11d country-code US both
!
interface Dot11Radio1.20
 encapsulation dot1Q 20 native
 no cdp enable
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 spanning-disabled
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
!
interface Dot11Radio1.25
 encapsulation dot1Q 25
 no cdp enable
 bridge-group 2
 bridge-group 2 subscriber-loop-control
 bridge-group 2 spanning-disabled
 bridge-group 2 block-unknown-source
 no bridge-group 2 source-learning
 no bridge-group 2 unicast-flooding
!
interface GigabitEthernet0
 no ip address
 duplex auto
 speed auto
!
interface GigabitEthernet0.20
 encapsulation dot1Q 20 native
 no cdp enable
 bridge-group 1
 bridge-group 1 spanning-disabled
 no bridge-group 1 source-learning
!
interface GigabitEthernet0.25
 encapsulation dot1Q 25
 no cdp enable
 bridge-group 2
 bridge-group 2 spanning-disabled
 no bridge-group 2 source-learning
!
interface BVI1
 mac-address 0042.6800.5138
 ip address 172.16.16.6 255.255.255.192
 ipv6 address dhcp
 ipv6 address autoconfig
 ipv6 enable
!
ip default-gateway 172.16.16.1
ip forward-protocol nd
no ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag5t4o0hwerkthit
!
no cdp run
!
!
bridge 1 route ip
!
!
!
line con 0
 login authentication CONSOLE
line vty 0 4
 login authentication CONSOLE
 transport input ssh
line vty 5 15
 login authentication CONSOLE
 transport input ssh
!
sntp server 0.us.pool.ntp.org
end

Rasika Nayanajith · ‎07-31-2016

channel width 80
 channel 5825

You have selected channel 5825 (CH165) for radio 1. This channel cannot use to bond 40MHz or 80 MHz width as it is isolated 5GHz channel.

Use channel 36 ,52 or 149 if you want 80MHz width (or else leave it to default & let AP to choose the preferred channel)

HTH

Rasika

*** Pls rate all useful responses ***

train_wreck · ‎07-31-2016

Excellent thank you.

In a related manner, the highest data rate I have seen a client connect with is ~866mbps. Is this the maximum expected rate of the AP, or could it support higher? (I imagine with a "Wave 2" module..._

Rasika Nayanajith · ‎08-01-2016

I think it may be your client capability, by looking at the below table, your device may be 2 spatial stream 11ac device which has max 866.7Mpbs data rate.

HTH

Rasika

*** Pls rate all useful responses ***

George Stefanick · ‎08-01-2016

Hello,

Wave 1 you can get you to 1.3 but that requires a supported client. Many times you will find the AP is much more capable than the wifi client. Example WAVE2. There are so few clients out as I type. :)

HTH

"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
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